diff --git a/precheck/tool-versions.json b/precheck/tool-versions.json
new file mode 100644
index 0000000..ce119f8
--- /dev/null
+++ b/precheck/tool-versions.json
@@ -0,0 +1,4 @@
+{
+  "klayout": "0.30.4",
+  "magic": "8.3.568"
+}